22
English
KM 90, KM 90 R
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the engine idle speed within fine
limits.
Standard Setting
:
Shut off the engine.
:
Assemble the KombiTool with the
attachment mounted.
:
Check the air filter and replace if
necessary.
:
Check adjustment of throttle cable
and readjust if necessary - see
"Adjusting the Throttle Cable"
:
"Check the spark arresting screen
(not installed in all countries) and
clean or replace if necessary.
:
Carefully turn both adjusting screws
counterclockwise as far as the stop:
The high speed screw (
H
) and low
speed screw (
L
) are now 3/4 turn
open.
:
Start and warm up the engine.
:
Adjust idle speed with the idle speed
screw (
LA
) so that the tool does not
move.
Fine Tuning
A slight correction of the setting of the
high speed screw (
H
) may be necessary
if engine power is not satisfactory when
operating at high altitude or at sea level.
Rule of thumb
Rotate the high speed screw (
H
) about
1
/
4
turn for every 3300 ft (1000 meter)
change in altitude
:
Carry out the standard setting.
:
Warm up engine for about
3 minutes.
Adjusting the Carburetor
266BA008 KN
Summary of Contents for KM 90
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Page 73: ...72 fran ais KM 90 KM 90 R...